Modeling of Two-Junction, Series-Connected Tandem Solar Cells using Top-Cell Thickness as an Adjustable Parameter

Sarah R. Kurtz, P. Faine, J. M. Olson

Research output: Contribution to journalArticlepeer-review

256 Scopus Citations

Abstract

Theoretical efficiencies are calculated for two-junction, series-connected solar cells using air mass 1.5 global and direct irradiance spectra. For band-gap combinations previously limited by a low bottom-cell current, thinning of the top cell is shown to result in significant increases in the theoretical efficiencies. The increases are primarily due to increased short-circuit currents, since current matching is achievable. Smaller gains are also seen in the open-circuit voltages of the thinner cells when a low surface-recombination velocity is assumed. Thus, a number of material combinations which previously could only be used in four-terminal configurations can now be considered for series-connected two-junction solar cells.

Original languageAmerican English
Pages (from-to)1890-1895
Number of pages6
JournalJournal of Applied Physics
Volume68
Issue number4
DOIs
StatePublished - 1990

NREL Publication Number

  • ACNR/JA-212-11456

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